Despite differences in the value of hogs within weight groups, most of the 12 to 17 million hogs Iowa farmers sell each year are "bought by the pound" on an average weight basis. Live grading offers one possible solution.
Clifton, E. S.
"How Much Are Your Hogs Worth?,"
Iowa Farm Science: Vol. 7
, Article 9.
Available at: https://lib.dr.iastate.edu/farmscience/vol7/iss9/9